Start with the instrument or system need, then clarify specifications and supplier capabilities.
COMPONENTS
Mirrors, lenses & substrates
Discuss geometry, material, surface requirements, quantities and intended use.
OPTICAL FUNCTIONS
Coatings & reflective optics
Discuss wavelength range, optical performance, environmental conditions and integration constraints.
TECHNICAL COORDINATION
Specifications & evidence
Align drawings, tolerances, inspection expectations, acceptance criteria and delivery requirements.
Application context
Keep development needs and flight requirements clear.
For early discussions, identify whether the request concerns a prototype, engineering model, calibration setup, ground-support equipment or flight hardware.
Any flight-use requirement needs its own qualification and evidence review. It is not implied by a product category.